NUC240 CAN bus遇到bus-off如何自动恢复

1万 · 2022-3-24 10:00

各位大大安安，我在BSP中CAN范例遇到CAN bus中断进到bus-off状态问题，导至message无法传送，想问除了重新上电复位之外，如何初始化让CAN bus自动恢复?

void CAN0_IRQHandler(void)
{
uint32_t u8IIDRstatus;
u8IIDRstatus = CAN0->IIDR;
if(u8IIDRstatus == 0x00008000) { /* Check Status Interrupt Flag (Error status Int and Status change Int) */
/**************************/
/* Status Change interrupt*/
/**************************/
if(CAN0->STATUS & CAN_STATUS_RXOK_Msk) {
CAN0->STATUS &= ~CAN_STATUS_RXOK_Msk; /* Clear RxOK status*/
printf("RxOK INT\n") ;
}
if(CAN0->STATUS & CAN_STATUS_TXOK_Msk) {
CAN0->STATUS &= ~CAN_STATUS_TXOK_Msk; /* Clear TxOK status*/
printf("TxOK INT\n") ;
}
/**************************/
/* Error Status interrupt */
/**************************/
if(CAN0->STATUS & CAN_STATUS_EWARN_Msk) {
printf("EWARN INT\n") ;
}
if(CAN0->STATUS & CAN_STATUS_BOFF_Msk) {
printf("BOFF INT\n") ;
}
} else if(u8IIDRstatus != 0) {
printf("=> Interrupt Pointer = %d\n", CAN0->IIDR - 1);
CAN_MsgInterrupt(CAN0, u8IIDRstatus);
CAN_CLR_INT_PENDING_BIT(CAN0, ((CAN0->IIDR) - 1)); /* Clear Interrupt Pending */
} else if(CAN0->WU_STATUS == 1) {
printf("Wake up\n");
CAN0->WU_STATUS = 0; /* Write '0' to clear */
}
}

复制代码

只看该作者 · 2022-3-24 15:15

什么是bus-off状态

只看该作者 · 2022-3-25 14:20

只看该作者 · 2022-4-8 14:47

怎么你们的can用的这么复杂
我就是简单的通信